Linguistics
About Trust as the answer to it all, I agree up to a point with B738 driver, and that point is illustrated by the Aviance Flight 52 crash of January 1990, not to forget the KLM/PANAM piggy back. Communications is yet another vital part of the whole issue of aviation safety and without appropriate standardisation of phraesology and language we all end up competing in lining up the holes in our little bits of Swiss Cheese